Fixes random password generator to generate strong value

Signed-off-by: Darshit Chanpura <dchanp@amazon.com>

Author: DarshitChanpura

.github/workflows/plugin_install.yml

@@ -16,8 +16,12 @@ jobs:
     runs-on: ${{ matrix.os }}
 
     steps:
-      - id: random-password
-        uses: peternied/random-name@v1
+      - uses: actions/checkout@v4
+      - id: generated-password
+      - name: Random Password Generator
+        uses: aammirmirza/RandomPasswordGenerator@1.2
+        with:
+          length: 15
 
       - name: Set up JDK
         uses: actions/setup-java@v4
@@ -45,7 +49,7 @@ jobs:
           opensearch-version: ${{ env.OPENSEARCH_VERSION }}
           plugins: "file:$(pwd)/${{ env.PLUGIN_NAME }}.zip"
           security-enabled: true
-          admin-password: ${{ steps.random-password.outputs.generated_name }}
+          admin-password: ${{ steps.generated-password.outputs.password }}
           jdk-version: 21
 
       - name: Run sanity tests